The Giants' Graves are the remains of two Neolithic chambered tombs on the Isle of Arran. They are situated within 40 metres of each other, and stand on a ridge 120 metres above the sea in a clearing in a forest, overlooking Whiting Bay to the south.
The northern cairn has been much robbed, but the edges are still well-defined. The chamber is 6 metres long, and around 1 metre wide. It was excavated in 1902, and among the artifacts recovered were pottery shards, flint knives, and leaf-shaped arrowheads.
The southern cairn is at right angles to the larger northern cairn. The chamber is about 4 metres long, and over 1 metre wide. Excavations in 1902 only revealed soil and stones, however in 1961-1962 further exploration produced nine sherds of a round-based vessel, and fragments of burnt bone.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.